﻿using System;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Linq;
using System.Windows;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using Tfs.OnTheRoad.Helpers;
using Tfs.OnTheRoad.Model;
using Tfs.OnTheRoad.ViewModel;
namespace Tfs.OnTheRoad
{
    public partial class App : Application
    {
        /// <summary>
        /// Provides easy access to the root frame of the Phone Application.
        /// </summary>
        /// <returns>The root frame of the Phone Application.</returns>
        public PhoneApplicationFrame RootFrame { get; private set; }

        /// <summary>
        /// Constructor for the Application object.
        /// </summary>
        public App()
        {
            // Global handler for uncaught exceptions. 
            UnhandledException += Application_UnhandledException;

            // Show graphics profiling information while debugging.
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // Display the current frame rate counters.
                Application.Current.Host.Settings.EnableFrameRateCounter = true;

                // Show the areas of the app that are being redrawn in each frame.
                //Application.Current.Host.Settings.EnableRedrawRegions = true;

                // Enable non-production analysis visualization mode, 
                // which shows areas of a page that are being GPU accelerated with a colored overlay.
                //Application.Current.Host.Settings.EnableCacheVisualization = true;
            }

            // Standard Silverlight initialization
            InitializeComponent();

            // Phone-specific initialization
            InitializePhoneApplication();
        }

        // Code to execute when the application is launching (eg, from Start)
        // This code will not execute when the application is reactivated
        private void Application_Launching(object sender, LaunchingEventArgs e)
        {
        }

        // Code to execute when the application is activated (brought to foreground)
        // This code will not execute when the application is first launched
        private void Application_Activated(object sender, ActivatedEventArgs e)
        {
        }

        // Code to execute when the application is deactivated (sent to background)
        // This code will not execute when the application is closing
        private void Application_Deactivated(object sender, DeactivatedEventArgs e)
        {
        }

        // Code to execute when the application is closing (eg, user hit Back)
        // This code will not execute when the application is deactivated
        private void Application_Closing(object sender, ClosingEventArgs e)
        {
        }

        // Code to execute if a navigation fails
        private void RootFrame_NavigationFailed(object sender, NavigationFailedEventArgs e)
        {
            MessageBox.Show(string.Format("An unexpected error hanppened while navigating:\n{0}", e.Exception.Message));
            e.Handled = true;
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // A navigation has failed; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }

        // Code to execute on Unhandled Exceptions
        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            MessageBox.Show(string.Format("An unexpected error hanppened:\n{0}", e.ExceptionObject.Message));
            e.Handled = true;
            if (System.Diagnostics.Debugger.IsAttached)
            {
                // An unhandled exception has occurred; break into the debugger
                System.Diagnostics.Debugger.Break();
            }
        }



        #region TFS On The Road App Methods
        public static TFSData CreateTfsDataServiceContext() { return CreateTfsDataServiceContext(SettingsViewModel); }
        public static TFSData CreateTfsDataServiceContext(SettingsViewModel settingsToUse)
        {
            var serviceUri = new Uri(settingsToUse.FullAddress);
            var context = new TFSData(serviceUri);

            context.SendingRequest += (s, e) =>
            {
                var credentials = string.Format(@"{0}\{1}:{2}", settingsToUse.Domain, settingsToUse.UserName, settingsToUse.Password);
                e.RequestHeaders["Authorization"] = string.Format(CultureInfo.InvariantCulture, "Basic {0}", Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(credentials)));
            };

            return context;
        }
        
        public const string IsolatedStorageFileName = "Tfs.OnTheRoad.Settings";

        private static ObservableCollection<SettingsViewModel> _settingsViewModels;
        public static ObservableCollection<SettingsViewModel> SettingsViewModels
        {
            get
            {
                return _settingsViewModels;
            }         
        }

        public void RemoveSettings()
        {
            SettingsViewModels.Remove(_settingsViewModel);
            _settingsViewModel = null;
        }
        
        private static SettingsViewModel _settingsViewModel;
        public static SettingsViewModel SettingsViewModel
        {
            get
            {
                if (_settingsViewModel == null)
                {
                    _settingsViewModels = SettingsStorageHelper.ReadSettings(IsolatedStorageFileName);
                    if (_settingsViewModels != null && _settingsViewModels.Count > 0)
                    {
                        _settingsViewModel = _settingsViewModels.First();
                        var defaultProfile = from setting in _settingsViewModels
                                             where setting.IsDefault
                                             select setting;
                        if (defaultProfile.Any())
                            _settingsViewModel = defaultProfile.First();
                        _settingsViewModel.LogingIn = false;
                    }
                    else
                    {
                        _settingsViewModel = new SettingsViewModel();
                        SettingsViewModels.Add(_settingsViewModel);
                    }
                }

                return _settingsViewModel;
            }

            set
            {
                _settingsViewModel = value;
            }
        }
        #endregion

        #region Phone application initialization

        // Avoid double-initialization
        private bool phoneApplicationInitialized = false;

        // Do not add any additional code to this method
        private void InitializePhoneApplication()
        {
            if (phoneApplicationInitialized)
                return;

            // Create the frame but don't set it as RootVisual yet; this allows the splash
            // screen to remain active until the application is ready to render.
            RootFrame = new Microsoft.Phone.Controls.TransitionFrame();
            RootFrame.Navigated += CompleteInitializePhoneApplication;

            // Handle navigation failures
            RootFrame.NavigationFailed += RootFrame_NavigationFailed;

            // Ensure we don't initialize again
            phoneApplicationInitialized = true;
        }

        // Do not add any additional code to this method
        private void CompleteInitializePhoneApplication(object sender, NavigationEventArgs e)
        {
            // Set the root visual to allow the application to render
            if (RootVisual != RootFrame)
                RootVisual = RootFrame;

            // Remove this handler since it is no longer needed
            RootFrame.Navigated -= CompleteInitializePhoneApplication;
        }

        #endregion
    }
}